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Interfacial diffusion-limited vapor-liquid-solid mechanism for the growth of tadpole-shaped boron nitride nanostructures |
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| Authors: | Heng Wang Fan Zhang Tianbin Zhu Qinghu Wang Xiong Liang Shaobai Sang Yawei Li Zhengyi Fu |
| Affiliation: | 1. The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, P. R. China
National-Provincial Joint Engineering Research Center of High-Temperature Materials and Lining Technology, Wuhan University of Science and Technology, Wuhan, P. R. China;2. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, P. R. China;3. The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, P. R. China;4. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, P. R. China Hubei Longzhong Laboratory, Xiangyang, P. R. China |
| Abstract: | Here, tadpole-shaped boron nitride (BN) nanostructures, with a length of ∼10 µm and a diameter ranging from 0.05 µm (tail) to 1.0 µm (head), were prepared by a facile two-step process, involving the synthesis of a cobalt carbonate-boron precursor, and its annealing using chemical vapor deposition in an ammonia atmosphere. Based on phase composition changes and microstructural evolution during annealing, and thermodynamic analysis, an interfacial diffusion-limited vapor-liquid-solid mechanism was proposed for the growth of the tadpole-shaped BN nanostructures. An understanding of the growth mechanism of the nano-tadpoles supplements the knowledge base of the BN nanostructure family and provides a new opportunity for the synthesis of analogous inorganic nanomaterials. |
| Keywords: | chemical vapor deposition cobalt carbonate-boron precursors growth mechanism tadpole-shaped boron nitride |